Revolving ventilator.



Patented Feb. 9. 1915.

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E S POTHEMONT REVOLVING VENTILATOR.

APPLICATION FILED PER-7, 1914. 1, 1 28,271.

STATES PATNT EDWARDS. 'BQTI-IEMONT, OF NEW YORK, N. Y., ASS-IGNOR. QF. ONE-.I'IALF TO. EUSTACE A.

POTHEMONT, OFI NEW YORK, N.. Y.

REVOLVING VENTILATQR;

Specification of Letters Patent.

Patented Feb. 9,1915.

Application filedlaebruary 7, 1914. Serial No. 817,119;

T all' whom. it may concern Be it known that I, EDWARD S. Porr n- MONT, a citizen of the United States, residing at 1038 Forest avenue, borough of Bronx, city of New York, and State of New tilators, and the object of my invention is to provide a simple, eiiicient and economical device of the character mentioned, so constructed, that a continuous upper draft is always maintained, irrespective of atmospheric or temperature conditions, while at the same time, snow and rain are prevented from entering the interior thereof. This I accomplish in the novel method illustrated in the accompanying drawings, in which- Figure 1 is a rear view of the device, Fig. 2 is a vertical. section on the lines 22 in Fig. 3, Fig. 3 is a front view of the device, Fig. 4 is a cross section on the lines l4 in Fig. 3.

Similar letters refer to similar parts throughout the several views.

In the roof or upper portion of the apartment or structure to be ventilated, I provide a tubular stack a, connected with the interior. A rod or spindle Z2 is supported in a vertical position on the stack a by the cross braces c in any desired manner. On the rod or spindle b' I provide a ventilating hood consisting of a shell d, a cover or roof section 6, an air duct f and an inverted conical air deflector g. I also provide a vane or rudder h to adjust the structure to the direction of the wind. The air duct f is provided with a flaring mouth 7 and an elbow section P which serves to deflect the air from a horizontal to an upward direction toward the discharge outlet or vent i, and the upper sention f of which forms an inner hood partly covering the air duct f, whereby the air is deflected toward the outlet 2', and with the outer hood or roof section e forms a passage for the foul air.

Within the elbow section f of the air duct f, I provide an inverted conical air deflector 9 having its sides set at a slightly upper section of'thetubular stack a and revolves thereon. The foul air rising through the stack a from the apartment to be ventilated, passes out at the outlet or vent i with the air admitted through the air duct f which forms the core of the column of discharged air.

My device being thus assembled, the mouth of the air duct 7 will be maintained constantly on the windward side of the device by the vane it, and will cause the wind to blow through the mouth 7 and the elbow section 7, passing out through the discharge outlet or vent 2'. The cross area of the air passage through the elbow section f being much smaller than the mouth 7 of the air passage, will cause the air to as sume a higher velocity in its passage through the elbow section, while the air passing across the mouth of the foul air chamber, formed within the shell (Z will tend to form a vacuum therein, and thus draw up through the stack a the vitiated air from the room or apartment of the building to be of the air duct, the foul air will be deflected, thereby aflording a freer passage.

around the air duct, while at the same time, the development of whirls of foul air or cross currents below the elbow section is avoided.

Having thus described my invention, what I claim is- 1. In a device of the character described, the combination of a shell forming a duct for the foul air, a fresh air duct therein, a conical air deflector arranged vertically in the fresh air duct and comprising a closed cone having no connection with the exterior air, and so located as to reduce the area of the fresh air duct, substantially as shown and described.

2. In a device of the character described, the combination of a shell forming a duct for the foul air, a fresh air duct provided with an elbow section in the shell, and a conical air deflector in the fresh air duct substantially as shown and described.

3. In a device of the character described, the combination of a shell forming a duct for the foul air, a fresh air duct provided with an elbow section in the shell, and a conical air deflector in the fresh air duct,

In testimony whereof, I have signed my 10 name to this specification in the presence of tWo subscribing Witnesses, this 31st day of January, 1914.

and a hood, substantially as shown and de' scribed.

4. In a device of the character described, the combination of a shell forming a duct for the foul air, a fresh air duct provided With an elbow section in the shell, a hood EDWARD POTHEMONT thereon, and a conical air deflector in the Witnesses:

fresh air duct, and an outer hood, substan- SAMPSON H. SoHWARz,

tially as shown and described. L. H. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

